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916703c0 TT |
1 | /* Everything about catch/throw catchpoints, for GDB. |
2 | ||
42a4f53d | 3 | Copyright (C) 1986-2019 Free Software Foundation, Inc. |
916703c0 TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
d55e5aa6 | 21 | #include "arch-utils.h" |
4de283e4 | 22 | #include <ctype.h> |
d55e5aa6 | 23 | #include "breakpoint.h" |
4de283e4 TT |
24 | #include "gdbcmd.h" |
25 | #include "inferior.h" | |
26 | #include "annotate.h" | |
27 | #include "valprint.h" | |
916703c0 TT |
28 | #include "cli/cli-utils.h" |
29 | #include "completer.h" | |
d55e5aa6 | 30 | #include "gdb_obstack.h" |
d55e5aa6 | 31 | #include "mi/mi-common.h" |
4de283e4 | 32 | #include "linespec.h" |
d55e5aa6 | 33 | #include "probe.h" |
4de283e4 TT |
34 | #include "objfiles.h" |
35 | #include "cp-abi.h" | |
36 | #include "gdb_regex.h" | |
37 | #include "cp-support.h" | |
38 | #include "location.h" | |
916703c0 TT |
39 | |
40 | /* Enums for exception-handling support. */ | |
41 | enum exception_event_kind | |
42 | { | |
43 | EX_EVENT_THROW, | |
44 | EX_EVENT_RETHROW, | |
45 | EX_EVENT_CATCH | |
46 | }; | |
47 | ||
fc4746a2 TT |
48 | /* Each spot where we may place an exception-related catchpoint has |
49 | two names: the SDT probe point and the function name. This | |
50 | structure holds both. */ | |
51 | ||
52 | struct exception_names | |
53 | { | |
54 | /* The name of the probe point to try, in the form accepted by | |
55 | 'parse_probes'. */ | |
56 | ||
57 | const char *probe; | |
58 | ||
59 | /* The name of the corresponding function. */ | |
60 | ||
61 | const char *function; | |
62 | }; | |
63 | ||
64 | /* Names of the probe points and functions on which to break. This is | |
65 | indexed by exception_event_kind. */ | |
66 | static const struct exception_names exception_functions[] = | |
15a73f56 | 67 | { |
fc4746a2 TT |
68 | { "-probe-stap libstdcxx:throw", "__cxa_throw" }, |
69 | { "-probe-stap libstdcxx:rethrow", "__cxa_rethrow" }, | |
70 | { "-probe-stap libstdcxx:catch", "__cxa_begin_catch" } | |
15a73f56 TT |
71 | }; |
72 | ||
73 | static struct breakpoint_ops gnu_v3_exception_catchpoint_ops; | |
74 | ||
75 | /* The type of an exception catchpoint. */ | |
76 | ||
c1fc2657 | 77 | struct exception_catchpoint : public breakpoint |
15a73f56 | 78 | { |
15a73f56 TT |
79 | /* The kind of exception catchpoint. */ |
80 | ||
81 | enum exception_event_kind kind; | |
cc16e6c9 | 82 | |
4fa8aeac TT |
83 | /* If not empty, a string holding the source form of the regular |
84 | expression to match against. */ | |
cc16e6c9 | 85 | |
4fa8aeac | 86 | std::string exception_rx; |
cc16e6c9 | 87 | |
2d7cc5c7 PA |
88 | /* If non-NULL, a compiled regular expression which is used to |
89 | determine which exceptions to stop on. */ | |
cc16e6c9 | 90 | |
2d7cc5c7 | 91 | std::unique_ptr<compiled_regex> pattern; |
15a73f56 TT |
92 | }; |
93 | ||
cc16e6c9 TT |
94 | \f |
95 | ||
96 | /* A helper function that fetches exception probe arguments. This | |
97 | fills in *ARG0 (if non-NULL) and *ARG1 (which must be non-NULL). | |
98 | It will throw an exception on any kind of failure. */ | |
99 | ||
100 | static void | |
101 | fetch_probe_arguments (struct value **arg0, struct value **arg1) | |
102 | { | |
103 | struct frame_info *frame = get_selected_frame (_("No frame selected")); | |
104 | CORE_ADDR pc = get_frame_pc (frame); | |
729662a5 | 105 | struct bound_probe pc_probe; |
cc16e6c9 TT |
106 | unsigned n_args; |
107 | ||
108 | pc_probe = find_probe_by_pc (pc); | |
935676c9 SDJ |
109 | if (pc_probe.prob == NULL |
110 | || pc_probe.prob->get_provider () != "libstdcxx" | |
111 | || (pc_probe.prob->get_name () != "catch" | |
112 | && pc_probe.prob->get_name () != "throw" | |
113 | && pc_probe.prob->get_name () != "rethrow")) | |
cc16e6c9 TT |
114 | error (_("not stopped at a C++ exception catchpoint")); |
115 | ||
935676c9 | 116 | n_args = pc_probe.prob->get_argument_count (frame); |
cc16e6c9 TT |
117 | if (n_args < 2) |
118 | error (_("C++ exception catchpoint has too few arguments")); | |
119 | ||
120 | if (arg0 != NULL) | |
935676c9 SDJ |
121 | *arg0 = pc_probe.prob->evaluate_argument (0, frame); |
122 | *arg1 = pc_probe.prob->evaluate_argument (1, frame); | |
cc16e6c9 TT |
123 | |
124 | if ((arg0 != NULL && *arg0 == NULL) || *arg1 == NULL) | |
125 | error (_("error computing probe argument at c++ exception catchpoint")); | |
126 | } | |
127 | ||
128 | \f | |
129 | ||
916703c0 TT |
130 | /* A helper function that returns a value indicating the kind of the |
131 | exception catchpoint B. */ | |
132 | ||
133 | static enum exception_event_kind | |
134 | classify_exception_breakpoint (struct breakpoint *b) | |
135 | { | |
15a73f56 TT |
136 | struct exception_catchpoint *cp = (struct exception_catchpoint *) b; |
137 | ||
138 | return cp->kind; | |
139 | } | |
140 | ||
cc16e6c9 TT |
141 | /* Implement the 'check_status' method. */ |
142 | ||
143 | static void | |
144 | check_status_exception_catchpoint (struct bpstats *bs) | |
145 | { | |
146 | struct exception_catchpoint *self | |
147 | = (struct exception_catchpoint *) bs->breakpoint_at; | |
2f408ecb | 148 | std::string type_name; |
cc16e6c9 TT |
149 | |
150 | bkpt_breakpoint_ops.check_status (bs); | |
151 | if (bs->stop == 0) | |
152 | return; | |
153 | ||
154 | if (self->pattern == NULL) | |
155 | return; | |
156 | ||
a70b8144 | 157 | try |
cc16e6c9 TT |
158 | { |
159 | struct value *typeinfo_arg; | |
2f408ecb | 160 | std::string canon; |
cc16e6c9 TT |
161 | |
162 | fetch_probe_arguments (NULL, &typeinfo_arg); | |
fe978cb0 | 163 | type_name = cplus_typename_from_type_info (typeinfo_arg); |
cc16e6c9 | 164 | |
2f408ecb PA |
165 | canon = cp_canonicalize_string (type_name.c_str ()); |
166 | if (!canon.empty ()) | |
167 | std::swap (type_name, canon); | |
cc16e6c9 | 168 | } |
230d2906 | 169 | catch (const gdb_exception_error &e) |
492d29ea PA |
170 | { |
171 | exception_print (gdb_stderr, e); | |
172 | } | |
cc16e6c9 | 173 | |
2f408ecb | 174 | if (!type_name.empty ()) |
7556d4a4 | 175 | { |
2d7cc5c7 | 176 | if (self->pattern->exec (type_name.c_str (), 0, NULL, 0) != 0) |
7556d4a4 | 177 | bs->stop = 0; |
7556d4a4 | 178 | } |
cc16e6c9 TT |
179 | } |
180 | ||
15a73f56 TT |
181 | /* Implement the 're_set' method. */ |
182 | ||
183 | static void | |
184 | re_set_exception_catchpoint (struct breakpoint *self) | |
185 | { | |
6c5b2ebe | 186 | std::vector<symtab_and_line> sals; |
15a73f56 | 187 | enum exception_event_kind kind = classify_exception_breakpoint (self); |
c2f4122d | 188 | struct program_space *filter_pspace = current_program_space; |
15a73f56 | 189 | |
1bff71c3 | 190 | /* We first try to use the probe interface. */ |
a70b8144 | 191 | try |
15a73f56 | 192 | { |
ffc2605c | 193 | event_location_up location |
5b56227b | 194 | = new_probe_location (exception_functions[kind].probe); |
ffc2605c | 195 | sals = parse_probes (location.get (), filter_pspace, NULL); |
1bff71c3 | 196 | } |
230d2906 | 197 | catch (const gdb_exception_error &e) |
1bff71c3 | 198 | { |
1bff71c3 SDJ |
199 | /* Using the probe interface failed. Let's fallback to the normal |
200 | catchpoint mode. */ | |
a70b8144 | 201 | try |
fc4746a2 | 202 | { |
67994074 | 203 | struct explicit_location explicit_loc; |
1bff71c3 | 204 | |
67994074 KS |
205 | initialize_explicit_location (&explicit_loc); |
206 | explicit_loc.function_name | |
00e52e53 | 207 | = ASTRDUP (exception_functions[kind].function); |
ffc2605c | 208 | event_location_up location = new_explicit_location (&explicit_loc); |
6c5b2ebe PA |
209 | sals = self->ops->decode_location (self, location.get (), |
210 | filter_pspace); | |
fc4746a2 | 211 | } |
230d2906 | 212 | catch (const gdb_exception_error &ex) |
7556d4a4 PA |
213 | { |
214 | /* NOT_FOUND_ERROR just means the breakpoint will be | |
215 | pending, so let it through. */ | |
216 | if (ex.error != NOT_FOUND_ERROR) | |
eedc3f4f | 217 | throw; |
7556d4a4 | 218 | } |
15a73f56 | 219 | } |
15a73f56 | 220 | |
6c5b2ebe | 221 | update_breakpoint_locations (self, filter_pspace, sals, {}); |
916703c0 TT |
222 | } |
223 | ||
224 | static enum print_stop_action | |
225 | print_it_exception_catchpoint (bpstat bs) | |
226 | { | |
227 | struct ui_out *uiout = current_uiout; | |
228 | struct breakpoint *b = bs->breakpoint_at; | |
229 | int bp_temp; | |
230 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
231 | ||
232 | annotate_catchpoint (b->number); | |
f303dbd6 | 233 | maybe_print_thread_hit_breakpoint (uiout); |
916703c0 TT |
234 | |
235 | bp_temp = b->disposition == disp_del; | |
112e8700 | 236 | uiout->text (bp_temp ? "Temporary catchpoint " |
916703c0 | 237 | : "Catchpoint "); |
2d33446d | 238 | uiout->field_int ("bkptno", b->number); |
112e8700 | 239 | uiout->text ((kind == EX_EVENT_THROW ? " (exception thrown), " |
916703c0 TT |
240 | : (kind == EX_EVENT_CATCH ? " (exception caught), " |
241 | : " (exception rethrown), "))); | |
112e8700 | 242 | if (uiout->is_mi_like_p ()) |
916703c0 | 243 | { |
112e8700 | 244 | uiout->field_string ("reason", |
916703c0 | 245 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
112e8700 | 246 | uiout->field_string ("disp", bpdisp_text (b->disposition)); |
916703c0 TT |
247 | } |
248 | return PRINT_SRC_AND_LOC; | |
249 | } | |
250 | ||
251 | static void | |
252 | print_one_exception_catchpoint (struct breakpoint *b, | |
253 | struct bp_location **last_loc) | |
254 | { | |
255 | struct value_print_options opts; | |
256 | struct ui_out *uiout = current_uiout; | |
257 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
258 | ||
259 | get_user_print_options (&opts); | |
260 | if (opts.addressprint) | |
261 | { | |
262 | annotate_field (4); | |
263 | if (b->loc == NULL || b->loc->shlib_disabled) | |
112e8700 | 264 | uiout->field_string ("addr", "<PENDING>"); |
916703c0 | 265 | else |
112e8700 | 266 | uiout->field_core_addr ("addr", |
916703c0 TT |
267 | b->loc->gdbarch, b->loc->address); |
268 | } | |
269 | annotate_field (5); | |
270 | if (b->loc) | |
271 | *last_loc = b->loc; | |
272 | ||
273 | switch (kind) | |
274 | { | |
275 | case EX_EVENT_THROW: | |
112e8700 SM |
276 | uiout->field_string ("what", "exception throw"); |
277 | if (uiout->is_mi_like_p ()) | |
278 | uiout->field_string ("catch-type", "throw"); | |
916703c0 TT |
279 | break; |
280 | ||
281 | case EX_EVENT_RETHROW: | |
112e8700 SM |
282 | uiout->field_string ("what", "exception rethrow"); |
283 | if (uiout->is_mi_like_p ()) | |
284 | uiout->field_string ("catch-type", "rethrow"); | |
916703c0 TT |
285 | break; |
286 | ||
287 | case EX_EVENT_CATCH: | |
112e8700 SM |
288 | uiout->field_string ("what", "exception catch"); |
289 | if (uiout->is_mi_like_p ()) | |
290 | uiout->field_string ("catch-type", "catch"); | |
916703c0 TT |
291 | break; |
292 | } | |
293 | } | |
294 | ||
cc16e6c9 TT |
295 | /* Implement the 'print_one_detail' method. */ |
296 | ||
297 | static void | |
298 | print_one_detail_exception_catchpoint (const struct breakpoint *b, | |
299 | struct ui_out *uiout) | |
300 | { | |
301 | const struct exception_catchpoint *cp | |
302 | = (const struct exception_catchpoint *) b; | |
303 | ||
4fa8aeac | 304 | if (!cp->exception_rx.empty ()) |
cc16e6c9 | 305 | { |
112e8700 | 306 | uiout->text (_("\tmatching: ")); |
4fa8aeac | 307 | uiout->field_string ("regexp", cp->exception_rx.c_str ()); |
112e8700 | 308 | uiout->text ("\n"); |
cc16e6c9 TT |
309 | } |
310 | } | |
311 | ||
916703c0 TT |
312 | static void |
313 | print_mention_exception_catchpoint (struct breakpoint *b) | |
314 | { | |
315 | struct ui_out *uiout = current_uiout; | |
316 | int bp_temp; | |
317 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
318 | ||
319 | bp_temp = b->disposition == disp_del; | |
112e8700 | 320 | uiout->text (bp_temp ? _("Temporary catchpoint ") |
916703c0 | 321 | : _("Catchpoint ")); |
112e8700 SM |
322 | uiout->field_int ("bkptno", b->number); |
323 | uiout->text ((kind == EX_EVENT_THROW ? _(" (throw)") | |
916703c0 TT |
324 | : (kind == EX_EVENT_CATCH ? _(" (catch)") |
325 | : _(" (rethrow)")))); | |
326 | } | |
327 | ||
328 | /* Implement the "print_recreate" breakpoint_ops method for throw and | |
329 | catch catchpoints. */ | |
330 | ||
331 | static void | |
332 | print_recreate_exception_catchpoint (struct breakpoint *b, | |
333 | struct ui_file *fp) | |
334 | { | |
335 | int bp_temp; | |
336 | enum exception_event_kind kind = classify_exception_breakpoint (b); | |
337 | ||
338 | bp_temp = b->disposition == disp_del; | |
339 | fprintf_unfiltered (fp, bp_temp ? "tcatch " : "catch "); | |
340 | switch (kind) | |
341 | { | |
342 | case EX_EVENT_THROW: | |
343 | fprintf_unfiltered (fp, "throw"); | |
344 | break; | |
345 | case EX_EVENT_CATCH: | |
346 | fprintf_unfiltered (fp, "catch"); | |
347 | break; | |
348 | case EX_EVENT_RETHROW: | |
349 | fprintf_unfiltered (fp, "rethrow"); | |
350 | break; | |
351 | } | |
352 | print_recreate_thread (b, fp); | |
353 | } | |
354 | ||
15a73f56 | 355 | static void |
4fa8aeac | 356 | handle_gnu_v3_exceptions (int tempflag, std::string &&except_rx, |
63160a43 | 357 | const char *cond_string, |
916703c0 TT |
358 | enum exception_event_kind ex_event, int from_tty) |
359 | { | |
2d7cc5c7 | 360 | std::unique_ptr<compiled_regex> pattern; |
cc16e6c9 | 361 | |
4fa8aeac | 362 | if (!except_rx.empty ()) |
cc16e6c9 | 363 | { |
4fa8aeac | 364 | pattern.reset (new compiled_regex (except_rx.c_str (), REG_NOSUB, |
2d7cc5c7 | 365 | _("invalid type-matching regexp"))); |
cc16e6c9 | 366 | } |
916703c0 | 367 | |
b22e99fd | 368 | std::unique_ptr<exception_catchpoint> cp (new exception_catchpoint ()); |
cc16e6c9 | 369 | |
c1fc2657 | 370 | init_catchpoint (cp.get (), get_current_arch (), tempflag, cond_string, |
15a73f56 TT |
371 | &gnu_v3_exception_catchpoint_ops); |
372 | /* We need to reset 'type' in order for code in breakpoint.c to do | |
373 | the right thing. */ | |
c1fc2657 | 374 | cp->type = bp_breakpoint; |
15a73f56 | 375 | cp->kind = ex_event; |
2f5404b3 | 376 | cp->exception_rx = std::move (except_rx); |
2d7cc5c7 | 377 | cp->pattern = std::move (pattern); |
15a73f56 | 378 | |
c1fc2657 | 379 | re_set_exception_catchpoint (cp.get ()); |
15a73f56 | 380 | |
b270e6f9 | 381 | install_breakpoint (0, std::move (cp), 1); |
cc16e6c9 TT |
382 | } |
383 | ||
384 | /* Look for an "if" token in *STRING. The "if" token must be preceded | |
385 | by whitespace. | |
386 | ||
387 | If there is any non-whitespace text between *STRING and the "if" | |
388 | token, then it is returned in a newly-xmalloc'd string. Otherwise, | |
389 | this returns NULL. | |
390 | ||
391 | STRING is updated to point to the "if" token, if it exists, or to | |
392 | the end of the string. */ | |
393 | ||
4fa8aeac | 394 | static std::string |
63160a43 | 395 | extract_exception_regexp (const char **string) |
cc16e6c9 | 396 | { |
63160a43 PA |
397 | const char *start; |
398 | const char *last, *last_space; | |
cc16e6c9 | 399 | |
f1735a53 | 400 | start = skip_spaces (*string); |
cc16e6c9 TT |
401 | |
402 | last = start; | |
403 | last_space = start; | |
404 | while (*last != '\0') | |
405 | { | |
63160a43 | 406 | const char *if_token = last; |
cc16e6c9 TT |
407 | |
408 | /* Check for the "if". */ | |
409 | if (check_for_argument (&if_token, "if", 2)) | |
410 | break; | |
411 | ||
412 | /* No "if" token here. Skip to the next word start. */ | |
413 | last_space = skip_to_space (last); | |
f1735a53 | 414 | last = skip_spaces (last_space); |
cc16e6c9 TT |
415 | } |
416 | ||
417 | *string = last; | |
418 | if (last_space > start) | |
4fa8aeac TT |
419 | return std::string (start, last_space - start); |
420 | return std::string (); | |
916703c0 TT |
421 | } |
422 | ||
423 | /* Deal with "catch catch", "catch throw", and "catch rethrow" | |
424 | commands. */ | |
425 | ||
426 | static void | |
63160a43 | 427 | catch_exception_command_1 (enum exception_event_kind ex_event, |
eb4c3f4a | 428 | const char *arg, |
916703c0 TT |
429 | int tempflag, int from_tty) |
430 | { | |
63160a43 | 431 | const char *cond_string = NULL; |
916703c0 TT |
432 | |
433 | if (!arg) | |
434 | arg = ""; | |
f1735a53 | 435 | arg = skip_spaces (arg); |
916703c0 | 436 | |
4fa8aeac | 437 | std::string except_rx = extract_exception_regexp (&arg); |
cc16e6c9 | 438 | |
916703c0 TT |
439 | cond_string = ep_parse_optional_if_clause (&arg); |
440 | ||
441 | if ((*arg != '\0') && !isspace (*arg)) | |
442 | error (_("Junk at end of arguments.")); | |
443 | ||
444 | if (ex_event != EX_EVENT_THROW | |
445 | && ex_event != EX_EVENT_CATCH | |
446 | && ex_event != EX_EVENT_RETHROW) | |
447 | error (_("Unsupported or unknown exception event; cannot catch it")); | |
448 | ||
4fa8aeac | 449 | handle_gnu_v3_exceptions (tempflag, std::move (except_rx), cond_string, |
cc16e6c9 | 450 | ex_event, from_tty); |
916703c0 TT |
451 | } |
452 | ||
453 | /* Implementation of "catch catch" command. */ | |
454 | ||
455 | static void | |
eb4c3f4a TT |
456 | catch_catch_command (const char *arg, int from_tty, |
457 | struct cmd_list_element *command) | |
916703c0 TT |
458 | { |
459 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
460 | ||
461 | catch_exception_command_1 (EX_EVENT_CATCH, arg, tempflag, from_tty); | |
462 | } | |
463 | ||
464 | /* Implementation of "catch throw" command. */ | |
465 | ||
466 | static void | |
eb4c3f4a TT |
467 | catch_throw_command (const char *arg, int from_tty, |
468 | struct cmd_list_element *command) | |
916703c0 TT |
469 | { |
470 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
471 | ||
472 | catch_exception_command_1 (EX_EVENT_THROW, arg, tempflag, from_tty); | |
473 | } | |
474 | ||
475 | /* Implementation of "catch rethrow" command. */ | |
476 | ||
477 | static void | |
eb4c3f4a | 478 | catch_rethrow_command (const char *arg, int from_tty, |
916703c0 TT |
479 | struct cmd_list_element *command) |
480 | { | |
481 | int tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
482 | ||
483 | catch_exception_command_1 (EX_EVENT_RETHROW, arg, tempflag, from_tty); | |
484 | } | |
485 | ||
486 | \f | |
487 | ||
72f1fe8a TT |
488 | /* Implement the 'make_value' method for the $_exception |
489 | internalvar. */ | |
490 | ||
491 | static struct value * | |
492 | compute_exception (struct gdbarch *argc, struct internalvar *var, void *ignore) | |
493 | { | |
72f1fe8a TT |
494 | struct value *arg0, *arg1; |
495 | struct type *obj_type; | |
496 | ||
cc16e6c9 | 497 | fetch_probe_arguments (&arg0, &arg1); |
72f1fe8a TT |
498 | |
499 | /* ARG0 is a pointer to the exception object. ARG1 is a pointer to | |
500 | the std::type_info for the exception. Now we find the type from | |
501 | the type_info and cast the result. */ | |
502 | obj_type = cplus_type_from_type_info (arg1); | |
503 | return value_ind (value_cast (make_pointer_type (obj_type, NULL), arg0)); | |
504 | } | |
505 | ||
506 | /* Implementation of the '$_exception' variable. */ | |
507 | ||
508 | static const struct internalvar_funcs exception_funcs = | |
509 | { | |
510 | compute_exception, | |
511 | NULL, | |
512 | NULL | |
513 | }; | |
514 | ||
515 | \f | |
516 | ||
916703c0 TT |
517 | static void |
518 | initialize_throw_catchpoint_ops (void) | |
519 | { | |
520 | struct breakpoint_ops *ops; | |
521 | ||
522 | initialize_breakpoint_ops (); | |
523 | ||
524 | /* GNU v3 exception catchpoints. */ | |
525 | ops = &gnu_v3_exception_catchpoint_ops; | |
526 | *ops = bkpt_breakpoint_ops; | |
15a73f56 | 527 | ops->re_set = re_set_exception_catchpoint; |
916703c0 TT |
528 | ops->print_it = print_it_exception_catchpoint; |
529 | ops->print_one = print_one_exception_catchpoint; | |
530 | ops->print_mention = print_mention_exception_catchpoint; | |
531 | ops->print_recreate = print_recreate_exception_catchpoint; | |
cc16e6c9 TT |
532 | ops->print_one_detail = print_one_detail_exception_catchpoint; |
533 | ops->check_status = check_status_exception_catchpoint; | |
916703c0 TT |
534 | } |
535 | ||
916703c0 TT |
536 | void |
537 | _initialize_break_catch_throw (void) | |
538 | { | |
539 | initialize_throw_catchpoint_ops (); | |
540 | ||
541 | /* Add catch and tcatch sub-commands. */ | |
542 | add_catch_command ("catch", _("\ | |
543 | Catch an exception, when caught."), | |
544 | catch_catch_command, | |
545 | NULL, | |
546 | CATCH_PERMANENT, | |
547 | CATCH_TEMPORARY); | |
548 | add_catch_command ("throw", _("\ | |
549 | Catch an exception, when thrown."), | |
550 | catch_throw_command, | |
551 | NULL, | |
552 | CATCH_PERMANENT, | |
553 | CATCH_TEMPORARY); | |
554 | add_catch_command ("rethrow", _("\ | |
555 | Catch an exception, when rethrown."), | |
556 | catch_rethrow_command, | |
557 | NULL, | |
558 | CATCH_PERMANENT, | |
559 | CATCH_TEMPORARY); | |
72f1fe8a TT |
560 | |
561 | create_internalvar_type_lazy ("_exception", &exception_funcs, NULL); | |
916703c0 | 562 | } |